Investigation of Track Gauge and Alignment Parameters of Ballasted Railway Tracks Based on Real Measurements Using Signal Processing Techniques

This paper deals with the time-frequency characteristic analysis for track geometry irregularities using field data recorded by a comprehensive inspection train. The parameters of gauge and left right rail alignment are considered to identify their wavelengths locations waveforms. In addition conventional time frequency domain analysis, auto-adaptive signal decomposition techniques used on four pre-selected sections. During series gauge, cumulative difference from mean value is calculated, which makes it possible distinguish section constructed non-standard initial gauges. sensitive obtained proper allocation wavelength ranges in Fourier Amplitude Spectrum original transform components detected Variational Mode Decomposition. can elucidate positions that affect vehicle responses.